Safety device for mine-cages



8(PESKULICH.

SAFETY DEVICE FOR MINE CAGES.

APPLICATION FILED AUGJ. I919.

1,334, 1 1 6. Patented Mar. 16, 1920.

2 SHEETS-SHEET I.

S. PESKULICH. SAFET-Y DEVIC FDR MINE CAGES.

APPLICATION fllED AUG-7| I9l9.

d m m UNITED STATES SLAVE rnsKULIcH, or surrn, MONTANA.

SAFETY DEVICE roe MINE-CAGES.

Specification of Letters Patent.

Patented Mar. 16,1920.

Application filed August 7, 1919. Serial No. 315,943.

To all whom it may concern:

Be it known that I, SLAVE Pnsxnmon, of Butte, in the county of Silverbowand State of Montana, have invented certain new and useful Improvementsin Safety Devices for Mine-Cages; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

This invention relates to safety devices for mine elevators. It is wellknown that serious accidents are not infrequent where no safety devicesare employed for detaching the car or cage of a mine elevator from itshoisting cable in the event that the hoist ing motor is not stopped whenthe car or cage has reached a predetermined point in its upward travel.

It is the object of this invention to provide an improved means foreffectively and quickly severing the cable from which the car or cage issuspended when the latter reaches a predetermined danger point.

In the drawings, Figure 1 is a view in side elevation of a portion ofthe shaft frame work and of the upper part of a car showing-my improveddevice in position. Fig. 2 is an enlarged view of my safety device withonly fragmentary portions of the shaft frame work and the car andshowing the device in cable cutting position. Fig. 3 is a horizontalsectional view on line 33, Fig. 4, and Fig. 4 is a view similar to Fig.2, the cutting blades being shown in section and in inoperativeposition. Fig. 5 is a detailed plan view of the cutting blades.

I have shown in conventional form the frame work of an elevator shaft at1, guide rails or tracks 2, cross beams 3, a shaft 4, sheave 5, andhoisting cable 6. I have also illustrated in similar manner a cage 7having a carrier 8 with which the hoisting cable 6 is connected.

15 indicates a pair of beams disposed on opposite sides of the tracks 2with sufiicient space between them to allow of uninterrupted assage ofthe hoisting cable. These beams orm a support for angle irons 16 towhich are pivoted the upper ends of pairs of links 16 operativelyconnected to the upper end of pairs of levers 17., such levers neartheir lower ends being pivoted, as at 18, to bars 19 forming part of aframe 20 which is sus ended by chains 21 from the prights of fie shaft rmerk. Each 0:

the bars 19 is provided with horizontally disposed grooves 22, 23, onits inner face, these grooves forming guide-ways for a pair of cuttingblades in the form of plates '25, the cutting edges 26, 27 beingdesigned for shear-like overlapping. The blades are shown in plan Viewin Fig. 5, and each is cut away at its sides, as at 28, to receive thelower ends of the levers 17 by which the blades are moved to sever acable, the levers bein beveled as at 29, for engagement with the soulders 30 formed by the cut out portions at the sides of the plates.Maintenance of the blades in normal inactive position is effected bycoiled springs 31 secured to the blade and to the frame 20.

A crown plate 32 secured to the supporting cables of the cage andforming part of the connection between such cables and the hoistingcable 6 is the means for operating the safety device.

At each end of the frame 20 is a spring actuated hook 33 adapted toengage and support the crown plate 32 of the cage, such hooks beingauxiliary to cage supporting means (not shown) with which all elevatorcages are equipped for supporting the cage when the latter becomesdetached from its hoisting cable.

In the hoisting of a cage where my improved safety device is employed ifthe cage is raised to the point where the crown plate 32 will engage theframe 20 the latter, in

the continued upward movement of the cage,

will be forced upwardly causing the links and connected levers to foldtoward each other. This causes the lower ends of the levers to act onthe blades 24, 25, and move them toward each other with a consequentsevering of the cable 8 which passes between them. Just prior to theengagement be tween the crown plate 32 and the frame 20, the former willhave contacted with hooks 33 which being forced against the tension oftheir springs will then fly back into position with their hooked endsunder the plate 32. Severance of the cable transfers the weight of thecage to the hooks 33 and these will draw the frame 20 down until it iswholly suspended by the chains 21. The descent of the cage to thisposition is effective for throwing the safety devices carried by thecage into operation.

The advantages of my invention are apparent. It will be seen that I haveprovided a very simple device for effectively severing a hoisting cableby the movement of the cage beyond a given danger point, and that thedevice has but few parts which are not liable to readily get out ororder. 7 w 7 I claim as my invention:

lhMeans for severing the hoisting cable of an elevator including afran'ie euttiagmeans slidably mounted on said frame, levers carried bysaid frame and adapted to anteater said (Hitting-V means, and meansfeiactuating'said levers. V

2. Means fer severing the hoisting cable of an elevator: inelading amovable frame, cutting means carried by said trams and movablerelatively themes and levers actuated by the: movementof aid frame toeifect relative movement of said cutting means, in combination withmeans- 'alllfl by said elevator for moving said frame.

3. Means for severing the hoisting cable of an elevator including amovable frame, a support therefor, duttingn eans carried by said frameand movable relatively thereto, pairs at levers ea le pivotallyconnected at one end to said'fmme adapted to actuate said cutting mmns,a fixed suppei t, and means interposed between. said fixed port and saidlevers fez: aetuatingthe latter, in combination with means for saidframe. 7

a. Means for severing the hoisting cable of an elevator ineluding amovable frame through which said cable passes, a support :tliy conneetedto said frame for said frame, cutting blades slidably mounted in saidframe, levers carried by said frame and adapted to actuate said out- 1ting blades, and means for actuating said levers.

5. Means for severing the hoisting cable of an elevator including amovabie frame throegltwhiohsaidteable passes, said frame oomprisinspaced a art side bars having horizontal y disposed g reoves on theirop- Eosed faces, a cross pieee c0n-nedi1ig"5aid ass, seating bladesspamming the spaee between said bars and slidable in the groovesthereoi, levers pivotally ounneeted at oheenal to said and adapted toactuate said cutting biedes, a fixed support, and links connecting the oposite ends of said levers with said fixed support, in combination withmeans foi noi'riingsaid flame;

6.- A safety devise 01" elevators ineksding a movable frame through:which the hoisting sable of the elevator is designed pass, a an oat tar7 frame; cutting" blades slide igyinoented in said frame, level-epithetand adapted to actuate said cutting blades, means for actuatinglE-VGI'S', and spring heoks adapted to hold said elevator when; saidcutting blades have severed the hoisting cable. 7 in testimony whereof Ihave signed this mei'fieation.

SLAVE PE3KULIQH.

